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1/*
2 * Helper macros to support writing architecture specific
3 * linker scripts.
4 *
5 * A minimal linker scripts has following content:
6 * [This is a sample, architectures may have special requiriements]
7 *
8 * OUTPUT_FORMAT(...)
9 * OUTPUT_ARCH(...)
10 * ENTRY(...)
11 * SECTIONS
12 * {
13 * . = START;
14 * __init_begin = .;
15 * HEAD_TEXT_SECTION
16 * INIT_TEXT_SECTION(PAGE_SIZE)
17 * INIT_DATA_SECTION(...)
18 * PERCPU_SECTION(CACHELINE_SIZE)
19 * __init_end = .;
20 *
21 * _stext = .;
22 * TEXT_SECTION = 0
23 * _etext = .;
24 *
25 * _sdata = .;
26 * RO_DATA_SECTION(PAGE_SIZE)
27 * RW_DATA_SECTION(...)
28 * _edata = .;
29 *
30 * EXCEPTION_TABLE(...)
31 * NOTES
32 *
33 * BSS_SECTION(0, 0, 0)
34 * _end = .;
35 *
36 * STABS_DEBUG
37 * DWARF_DEBUG
38 *
39 * DISCARDS // must be the last
40 * }
41 *
42 * [__init_begin, __init_end] is the init section that may be freed after init
43 * // __init_begin and __init_end should be page aligned, so that we can
44 * // free the whole .init memory
45 * [_stext, _etext] is the text section
46 * [_sdata, _edata] is the data section
47 *
48 * Some of the included output section have their own set of constants.
49 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
50 * [__nosave_begin, __nosave_end] for the nosave data
51 */
52
53#ifndef LOAD_OFFSET
54#define LOAD_OFFSET 0
55#endif
56
57/* Align . to a 8 byte boundary equals to maximum function alignment. */
58#define ALIGN_FUNCTION() . = ALIGN(8)
59
60/*
61 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
62 * generates .data.identifier sections, which need to be pulled in with
63 * .data. We don't want to pull in .data..other sections, which Linux
64 * has defined. Same for text and bss.
65 *
66 * RODATA_MAIN is not used because existing code already defines .rodata.x
67 * sections to be brought in with rodata.
68 */
69#ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
70#define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
71#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
72#define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
73#define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
74#define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
75#define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
76#else
77#define TEXT_MAIN .text
78#define DATA_MAIN .data
79#define SDATA_MAIN .sdata
80#define RODATA_MAIN .rodata
81#define BSS_MAIN .bss
82#define SBSS_MAIN .sbss
83#endif
84
85/*
86 * Align to a 32 byte boundary equal to the
87 * alignment gcc 4.5 uses for a struct
88 */
89#define STRUCT_ALIGNMENT 32
90#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
91
92/* The actual configuration determine if the init/exit sections
93 * are handled as text/data or they can be discarded (which
94 * often happens at runtime)
95 */
96#ifdef CONFIG_HOTPLUG_CPU
97#define CPU_KEEP(sec) *(.cpu##sec)
98#define CPU_DISCARD(sec)
99#else
100#define CPU_KEEP(sec)
101#define CPU_DISCARD(sec) *(.cpu##sec)
102#endif
103
104#if defined(CONFIG_MEMORY_HOTPLUG)
105#define MEM_KEEP(sec) *(.mem##sec)
106#define MEM_DISCARD(sec)
107#else
108#define MEM_KEEP(sec)
109#define MEM_DISCARD(sec) *(.mem##sec)
110#endif
111
112#ifdef CONFIG_FTRACE_MCOUNT_RECORD
113#ifdef CC_USING_PATCHABLE_FUNCTION_ENTRY
114#define MCOUNT_REC() . = ALIGN(8); \
115 __start_mcount_loc = .; \
116 KEEP(*(__patchable_function_entries)) \
117 __stop_mcount_loc = .;
118#else
119#define MCOUNT_REC() . = ALIGN(8); \
120 __start_mcount_loc = .; \
121 KEEP(*(__mcount_loc)) \
122 __stop_mcount_loc = .;
123#endif
124#else
125#define MCOUNT_REC()
126#endif
127
128#ifdef CONFIG_TRACE_BRANCH_PROFILING
129#define LIKELY_PROFILE() __start_annotated_branch_profile = .; \
130 KEEP(*(_ftrace_annotated_branch)) \
131 __stop_annotated_branch_profile = .;
132#else
133#define LIKELY_PROFILE()
134#endif
135
136#ifdef CONFIG_PROFILE_ALL_BRANCHES
137#define BRANCH_PROFILE() __start_branch_profile = .; \
138 KEEP(*(_ftrace_branch)) \
139 __stop_branch_profile = .;
140#else
141#define BRANCH_PROFILE()
142#endif
143
144#ifdef CONFIG_KPROBES
145#define KPROBE_BLACKLIST() . = ALIGN(8); \
146 __start_kprobe_blacklist = .; \
147 KEEP(*(_kprobe_blacklist)) \
148 __stop_kprobe_blacklist = .;
149#else
150#define KPROBE_BLACKLIST()
151#endif
152
153#ifdef CONFIG_FUNCTION_ERROR_INJECTION
154#define ERROR_INJECT_WHITELIST() STRUCT_ALIGN(); \
155 __start_error_injection_whitelist = .; \
156 KEEP(*(_error_injection_whitelist)) \
157 __stop_error_injection_whitelist = .;
158#else
159#define ERROR_INJECT_WHITELIST()
160#endif
161
162#ifdef CONFIG_EVENT_TRACING
163#define FTRACE_EVENTS() . = ALIGN(8); \
164 __start_ftrace_events = .; \
165 KEEP(*(_ftrace_events)) \
166 __stop_ftrace_events = .; \
167 __start_ftrace_eval_maps = .; \
168 KEEP(*(_ftrace_eval_map)) \
169 __stop_ftrace_eval_maps = .;
170#else
171#define FTRACE_EVENTS()
172#endif
173
174#ifdef CONFIG_TRACING
175#define TRACE_PRINTKS() __start___trace_bprintk_fmt = .; \
176 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
177 __stop___trace_bprintk_fmt = .;
178#define TRACEPOINT_STR() __start___tracepoint_str = .; \
179 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
180 __stop___tracepoint_str = .;
181#else
182#define TRACE_PRINTKS()
183#define TRACEPOINT_STR()
184#endif
185
186#ifdef CONFIG_FTRACE_SYSCALLS
187#define TRACE_SYSCALLS() . = ALIGN(8); \
188 __start_syscalls_metadata = .; \
189 KEEP(*(__syscalls_metadata)) \
190 __stop_syscalls_metadata = .;
191#else
192#define TRACE_SYSCALLS()
193#endif
194
195#ifdef CONFIG_BPF_EVENTS
196#define BPF_RAW_TP() STRUCT_ALIGN(); \
197 __start__bpf_raw_tp = .; \
198 KEEP(*(__bpf_raw_tp_map)) \
199 __stop__bpf_raw_tp = .;
200#else
201#define BPF_RAW_TP()
202#endif
203
204#ifdef CONFIG_SERIAL_EARLYCON
205#define EARLYCON_TABLE() . = ALIGN(8); \
206 __earlycon_table = .; \
207 KEEP(*(__earlycon_table)) \
208 __earlycon_table_end = .;
209#else
210#define EARLYCON_TABLE()
211#endif
212
213#ifdef CONFIG_SECURITY
214#define LSM_TABLE() . = ALIGN(8); \
215 __start_lsm_info = .; \
216 KEEP(*(.lsm_info.init)) \
217 __end_lsm_info = .;
218#define EARLY_LSM_TABLE() . = ALIGN(8); \
219 __start_early_lsm_info = .; \
220 KEEP(*(.early_lsm_info.init)) \
221 __end_early_lsm_info = .;
222#else
223#define LSM_TABLE()
224#define EARLY_LSM_TABLE()
225#endif
226
227#define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
228#define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
229#define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name)
230#define _OF_TABLE_0(name)
231#define _OF_TABLE_1(name) \
232 . = ALIGN(8); \
233 __##name##_of_table = .; \
234 KEEP(*(__##name##_of_table)) \
235 KEEP(*(__##name##_of_table_end))
236
237#define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer)
238#define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
239#define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
240#define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
241#define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
242#define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
243
244#ifdef CONFIG_ACPI
245#define ACPI_PROBE_TABLE(name) \
246 . = ALIGN(8); \
247 __##name##_acpi_probe_table = .; \
248 KEEP(*(__##name##_acpi_probe_table)) \
249 __##name##_acpi_probe_table_end = .;
250#else
251#define ACPI_PROBE_TABLE(name)
252#endif
253
254#ifdef CONFIG_THERMAL
255#define THERMAL_TABLE(name) \
256 . = ALIGN(8); \
257 __##name##_thermal_table = .; \
258 KEEP(*(__##name##_thermal_table)) \
259 __##name##_thermal_table_end = .;
260#else
261#define THERMAL_TABLE(name)
262#endif
263
264#define KERNEL_DTB() \
265 STRUCT_ALIGN(); \
266 __dtb_start = .; \
267 KEEP(*(.dtb.init.rodata)) \
268 __dtb_end = .;
269
270/*
271 * .data section
272 */
273#define DATA_DATA \
274 *(.xiptext) \
275 *(DATA_MAIN) \
276 *(.ref.data) \
277 *(.data..shared_aligned) /* percpu related */ \
278 MEM_KEEP(init.data*) \
279 MEM_KEEP(exit.data*) \
280 *(.data.unlikely) \
281 __start_once = .; \
282 *(.data.once) \
283 __end_once = .; \
284 STRUCT_ALIGN(); \
285 *(__tracepoints) \
286 /* implement dynamic printk debug */ \
287 . = ALIGN(8); \
288 __start___verbose = .; \
289 KEEP(*(__verbose)) \
290 __stop___verbose = .; \
291 LIKELY_PROFILE() \
292 BRANCH_PROFILE() \
293 TRACE_PRINTKS() \
294 BPF_RAW_TP() \
295 TRACEPOINT_STR()
296
297/*
298 * Data section helpers
299 */
300#define NOSAVE_DATA \
301 . = ALIGN(PAGE_SIZE); \
302 __nosave_begin = .; \
303 *(.data..nosave) \
304 . = ALIGN(PAGE_SIZE); \
305 __nosave_end = .;
306
307#define PAGE_ALIGNED_DATA(page_align) \
308 . = ALIGN(page_align); \
309 *(.data..page_aligned)
310
311#define READ_MOSTLY_DATA(align) \
312 . = ALIGN(align); \
313 *(.data..read_mostly) \
314 . = ALIGN(align);
315
316#define CACHELINE_ALIGNED_DATA(align) \
317 . = ALIGN(align); \
318 *(.data..cacheline_aligned)
319
320#define INIT_TASK_DATA(align) \
321 . = ALIGN(align); \
322 __start_init_task = .; \
323 init_thread_union = .; \
324 init_stack = .; \
325 KEEP(*(.data..init_task)) \
326 KEEP(*(.data..init_thread_info)) \
327 . = __start_init_task + THREAD_SIZE; \
328 __end_init_task = .;
329
330#define JUMP_TABLE_DATA \
331 . = ALIGN(8); \
332 __start___jump_table = .; \
333 KEEP(*(__jump_table)) \
334 __stop___jump_table = .;
335
336/*
337 * Allow architectures to handle ro_after_init data on their
338 * own by defining an empty RO_AFTER_INIT_DATA.
339 */
340#ifndef RO_AFTER_INIT_DATA
341#define RO_AFTER_INIT_DATA \
342 __start_ro_after_init = .; \
343 *(.data..ro_after_init) \
344 JUMP_TABLE_DATA \
345 __end_ro_after_init = .;
346#endif
347
348/*
349 * Read only Data
350 */
351#define RO_DATA_SECTION(align) \
352 . = ALIGN((align)); \
353 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
354 __start_rodata = .; \
355 *(.rodata) *(.rodata.*) \
356 RO_AFTER_INIT_DATA /* Read only after init */ \
357 . = ALIGN(8); \
358 __start___tracepoints_ptrs = .; \
359 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
360 __stop___tracepoints_ptrs = .; \
361 *(__tracepoints_strings)/* Tracepoints: strings */ \
362 } \
363 \
364 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
365 *(.rodata1) \
366 } \
367 \
368 /* PCI quirks */ \
369 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
370 __start_pci_fixups_early = .; \
371 KEEP(*(.pci_fixup_early)) \
372 __end_pci_fixups_early = .; \
373 __start_pci_fixups_header = .; \
374 KEEP(*(.pci_fixup_header)) \
375 __end_pci_fixups_header = .; \
376 __start_pci_fixups_final = .; \
377 KEEP(*(.pci_fixup_final)) \
378 __end_pci_fixups_final = .; \
379 __start_pci_fixups_enable = .; \
380 KEEP(*(.pci_fixup_enable)) \
381 __end_pci_fixups_enable = .; \
382 __start_pci_fixups_resume = .; \
383 KEEP(*(.pci_fixup_resume)) \
384 __end_pci_fixups_resume = .; \
385 __start_pci_fixups_resume_early = .; \
386 KEEP(*(.pci_fixup_resume_early)) \
387 __end_pci_fixups_resume_early = .; \
388 __start_pci_fixups_suspend = .; \
389 KEEP(*(.pci_fixup_suspend)) \
390 __end_pci_fixups_suspend = .; \
391 __start_pci_fixups_suspend_late = .; \
392 KEEP(*(.pci_fixup_suspend_late)) \
393 __end_pci_fixups_suspend_late = .; \
394 } \
395 \
396 /* Built-in firmware blobs */ \
397 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
398 __start_builtin_fw = .; \
399 KEEP(*(.builtin_fw)) \
400 __end_builtin_fw = .; \
401 } \
402 \
403 TRACEDATA \
404 \
405 /* Kernel symbol table: Normal symbols */ \
406 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
407 __start___ksymtab = .; \
408 KEEP(*(SORT(___ksymtab+*))) \
409 __stop___ksymtab = .; \
410 } \
411 \
412 /* Kernel symbol table: GPL-only symbols */ \
413 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
414 __start___ksymtab_gpl = .; \
415 KEEP(*(SORT(___ksymtab_gpl+*))) \
416 __stop___ksymtab_gpl = .; \
417 } \
418 \
419 /* Kernel symbol table: Normal unused symbols */ \
420 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
421 __start___ksymtab_unused = .; \
422 KEEP(*(SORT(___ksymtab_unused+*))) \
423 __stop___ksymtab_unused = .; \
424 } \
425 \
426 /* Kernel symbol table: GPL-only unused symbols */ \
427 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
428 __start___ksymtab_unused_gpl = .; \
429 KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
430 __stop___ksymtab_unused_gpl = .; \
431 } \
432 \
433 /* Kernel symbol table: GPL-future-only symbols */ \
434 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
435 __start___ksymtab_gpl_future = .; \
436 KEEP(*(SORT(___ksymtab_gpl_future+*))) \
437 __stop___ksymtab_gpl_future = .; \
438 } \
439 \
440 /* Kernel symbol table: Normal symbols */ \
441 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
442 __start___kcrctab = .; \
443 KEEP(*(SORT(___kcrctab+*))) \
444 __stop___kcrctab = .; \
445 } \
446 \
447 /* Kernel symbol table: GPL-only symbols */ \
448 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
449 __start___kcrctab_gpl = .; \
450 KEEP(*(SORT(___kcrctab_gpl+*))) \
451 __stop___kcrctab_gpl = .; \
452 } \
453 \
454 /* Kernel symbol table: Normal unused symbols */ \
455 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
456 __start___kcrctab_unused = .; \
457 KEEP(*(SORT(___kcrctab_unused+*))) \
458 __stop___kcrctab_unused = .; \
459 } \
460 \
461 /* Kernel symbol table: GPL-only unused symbols */ \
462 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
463 __start___kcrctab_unused_gpl = .; \
464 KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
465 __stop___kcrctab_unused_gpl = .; \
466 } \
467 \
468 /* Kernel symbol table: GPL-future-only symbols */ \
469 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
470 __start___kcrctab_gpl_future = .; \
471 KEEP(*(SORT(___kcrctab_gpl_future+*))) \
472 __stop___kcrctab_gpl_future = .; \
473 } \
474 \
475 /* Kernel symbol table: strings */ \
476 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
477 *(__ksymtab_strings) \
478 } \
479 \
480 /* __*init sections */ \
481 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
482 *(.ref.rodata) \
483 MEM_KEEP(init.rodata) \
484 MEM_KEEP(exit.rodata) \
485 } \
486 \
487 /* Built-in module parameters. */ \
488 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
489 __start___param = .; \
490 KEEP(*(__param)) \
491 __stop___param = .; \
492 } \
493 \
494 /* Built-in module versions. */ \
495 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
496 __start___modver = .; \
497 KEEP(*(__modver)) \
498 __stop___modver = .; \
499 . = ALIGN((align)); \
500 __end_rodata = .; \
501 } \
502 . = ALIGN((align));
503
504/* RODATA & RO_DATA provided for backward compatibility.
505 * All archs are supposed to use RO_DATA() */
506#define RODATA RO_DATA_SECTION(4096)
507#define RO_DATA(align) RO_DATA_SECTION(align)
508
509/*
510 * .text section. Map to function alignment to avoid address changes
511 * during second ld run in second ld pass when generating System.map
512 *
513 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
514 * code elimination is enabled, so these sections should be converted
515 * to use ".." first.
516 */
517#define TEXT_TEXT \
518 ALIGN_FUNCTION(); \
519 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \
520 *(.text..refcount) \
521 *(.ref.text) \
522 MEM_KEEP(init.text*) \
523 MEM_KEEP(exit.text*) \
524
525
526/* sched.text is aling to function alignment to secure we have same
527 * address even at second ld pass when generating System.map */
528#define SCHED_TEXT \
529 ALIGN_FUNCTION(); \
530 __sched_text_start = .; \
531 *(.sched.text) \
532 __sched_text_end = .;
533
534/* spinlock.text is aling to function alignment to secure we have same
535 * address even at second ld pass when generating System.map */
536#define LOCK_TEXT \
537 ALIGN_FUNCTION(); \
538 __lock_text_start = .; \
539 *(.spinlock.text) \
540 __lock_text_end = .;
541
542#define CPUIDLE_TEXT \
543 ALIGN_FUNCTION(); \
544 __cpuidle_text_start = .; \
545 *(.cpuidle.text) \
546 __cpuidle_text_end = .;
547
548#define KPROBES_TEXT \
549 ALIGN_FUNCTION(); \
550 __kprobes_text_start = .; \
551 *(.kprobes.text) \
552 __kprobes_text_end = .;
553
554#define ENTRY_TEXT \
555 ALIGN_FUNCTION(); \
556 __entry_text_start = .; \
557 *(.entry.text) \
558 __entry_text_end = .;
559
560#define IRQENTRY_TEXT \
561 ALIGN_FUNCTION(); \
562 __irqentry_text_start = .; \
563 *(.irqentry.text) \
564 __irqentry_text_end = .;
565
566#define SOFTIRQENTRY_TEXT \
567 ALIGN_FUNCTION(); \
568 __softirqentry_text_start = .; \
569 *(.softirqentry.text) \
570 __softirqentry_text_end = .;
571
572/* Section used for early init (in .S files) */
573#define HEAD_TEXT KEEP(*(.head.text))
574
575#define HEAD_TEXT_SECTION \
576 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
577 HEAD_TEXT \
578 }
579
580/*
581 * Exception table
582 */
583#define EXCEPTION_TABLE(align) \
584 . = ALIGN(align); \
585 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
586 __start___ex_table = .; \
587 KEEP(*(__ex_table)) \
588 __stop___ex_table = .; \
589 }
590
591/*
592 * Init task
593 */
594#define INIT_TASK_DATA_SECTION(align) \
595 . = ALIGN(align); \
596 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
597 INIT_TASK_DATA(align) \
598 }
599
600#ifdef CONFIG_CONSTRUCTORS
601#define KERNEL_CTORS() . = ALIGN(8); \
602 __ctors_start = .; \
603 KEEP(*(.ctors)) \
604 KEEP(*(SORT(.init_array.*))) \
605 KEEP(*(.init_array)) \
606 __ctors_end = .;
607#else
608#define KERNEL_CTORS()
609#endif
610
611/* init and exit section handling */
612#define INIT_DATA \
613 KEEP(*(SORT(___kentry+*))) \
614 *(.init.data init.data.*) \
615 MEM_DISCARD(init.data*) \
616 KERNEL_CTORS() \
617 MCOUNT_REC() \
618 *(.init.rodata .init.rodata.*) \
619 FTRACE_EVENTS() \
620 TRACE_SYSCALLS() \
621 KPROBE_BLACKLIST() \
622 ERROR_INJECT_WHITELIST() \
623 MEM_DISCARD(init.rodata) \
624 CLK_OF_TABLES() \
625 RESERVEDMEM_OF_TABLES() \
626 TIMER_OF_TABLES() \
627 CPU_METHOD_OF_TABLES() \
628 CPUIDLE_METHOD_OF_TABLES() \
629 KERNEL_DTB() \
630 IRQCHIP_OF_MATCH_TABLE() \
631 ACPI_PROBE_TABLE(irqchip) \
632 ACPI_PROBE_TABLE(timer) \
633 THERMAL_TABLE(governor) \
634 EARLYCON_TABLE() \
635 LSM_TABLE() \
636 EARLY_LSM_TABLE()
637
638#define INIT_TEXT \
639 *(.init.text .init.text.*) \
640 *(.text.startup) \
641 MEM_DISCARD(init.text*)
642
643#define EXIT_DATA \
644 *(.exit.data .exit.data.*) \
645 *(.fini_array .fini_array.*) \
646 *(.dtors .dtors.*) \
647 MEM_DISCARD(exit.data*) \
648 MEM_DISCARD(exit.rodata*)
649
650#define EXIT_TEXT \
651 *(.exit.text) \
652 *(.text.exit) \
653 MEM_DISCARD(exit.text)
654
655#define EXIT_CALL \
656 *(.exitcall.exit)
657
658/*
659 * bss (Block Started by Symbol) - uninitialized data
660 * zeroed during startup
661 */
662#define SBSS(sbss_align) \
663 . = ALIGN(sbss_align); \
664 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
665 *(.dynsbss) \
666 *(SBSS_MAIN) \
667 *(.scommon) \
668 }
669
670/*
671 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
672 * sections to the front of bss.
673 */
674#ifndef BSS_FIRST_SECTIONS
675#define BSS_FIRST_SECTIONS
676#endif
677
678#define BSS(bss_align) \
679 . = ALIGN(bss_align); \
680 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
681 BSS_FIRST_SECTIONS \
682 *(.bss..page_aligned) \
683 *(.dynbss) \
684 *(BSS_MAIN) \
685 *(COMMON) \
686 }
687
688/*
689 * DWARF debug sections.
690 * Symbols in the DWARF debugging sections are relative to
691 * the beginning of the section so we begin them at 0.
692 */
693#define DWARF_DEBUG \
694 /* DWARF 1 */ \
695 .debug 0 : { *(.debug) } \
696 .line 0 : { *(.line) } \
697 /* GNU DWARF 1 extensions */ \
698 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
699 .debug_sfnames 0 : { *(.debug_sfnames) } \
700 /* DWARF 1.1 and DWARF 2 */ \
701 .debug_aranges 0 : { *(.debug_aranges) } \
702 .debug_pubnames 0 : { *(.debug_pubnames) } \
703 /* DWARF 2 */ \
704 .debug_info 0 : { *(.debug_info \
705 .gnu.linkonce.wi.*) } \
706 .debug_abbrev 0 : { *(.debug_abbrev) } \
707 .debug_line 0 : { *(.debug_line) } \
708 .debug_frame 0 : { *(.debug_frame) } \
709 .debug_str 0 : { *(.debug_str) } \
710 .debug_loc 0 : { *(.debug_loc) } \
711 .debug_macinfo 0 : { *(.debug_macinfo) } \
712 .debug_pubtypes 0 : { *(.debug_pubtypes) } \
713 /* DWARF 3 */ \
714 .debug_ranges 0 : { *(.debug_ranges) } \
715 /* SGI/MIPS DWARF 2 extensions */ \
716 .debug_weaknames 0 : { *(.debug_weaknames) } \
717 .debug_funcnames 0 : { *(.debug_funcnames) } \
718 .debug_typenames 0 : { *(.debug_typenames) } \
719 .debug_varnames 0 : { *(.debug_varnames) } \
720 /* GNU DWARF 2 extensions */ \
721 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
722 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
723 /* DWARF 4 */ \
724 .debug_types 0 : { *(.debug_types) } \
725 /* DWARF 5 */ \
726 .debug_macro 0 : { *(.debug_macro) } \
727 .debug_addr 0 : { *(.debug_addr) }
728
729 /* Stabs debugging sections. */
730#define STABS_DEBUG \
731 .stab 0 : { *(.stab) } \
732 .stabstr 0 : { *(.stabstr) } \
733 .stab.excl 0 : { *(.stab.excl) } \
734 .stab.exclstr 0 : { *(.stab.exclstr) } \
735 .stab.index 0 : { *(.stab.index) } \
736 .stab.indexstr 0 : { *(.stab.indexstr) } \
737 .comment 0 : { *(.comment) }
738
739#ifdef CONFIG_GENERIC_BUG
740#define BUG_TABLE \
741 . = ALIGN(8); \
742 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
743 __start___bug_table = .; \
744 KEEP(*(__bug_table)) \
745 __stop___bug_table = .; \
746 }
747#else
748#define BUG_TABLE
749#endif
750
751#ifdef CONFIG_UNWINDER_ORC
752#define ORC_UNWIND_TABLE \
753 . = ALIGN(4); \
754 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \
755 __start_orc_unwind_ip = .; \
756 KEEP(*(.orc_unwind_ip)) \
757 __stop_orc_unwind_ip = .; \
758 } \
759 . = ALIGN(2); \
760 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \
761 __start_orc_unwind = .; \
762 KEEP(*(.orc_unwind)) \
763 __stop_orc_unwind = .; \
764 } \
765 . = ALIGN(4); \
766 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \
767 orc_lookup = .; \
768 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \
769 LOOKUP_BLOCK_SIZE) + 1) * 4; \
770 orc_lookup_end = .; \
771 }
772#else
773#define ORC_UNWIND_TABLE
774#endif
775
776#ifdef CONFIG_PM_TRACE
777#define TRACEDATA \
778 . = ALIGN(4); \
779 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
780 __tracedata_start = .; \
781 KEEP(*(.tracedata)) \
782 __tracedata_end = .; \
783 }
784#else
785#define TRACEDATA
786#endif
787
788#define NOTES \
789 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
790 __start_notes = .; \
791 KEEP(*(.note.*)) \
792 __stop_notes = .; \
793 }
794
795#define INIT_SETUP(initsetup_align) \
796 . = ALIGN(initsetup_align); \
797 __setup_start = .; \
798 KEEP(*(.init.setup)) \
799 __setup_end = .;
800
801#define INIT_CALLS_LEVEL(level) \
802 __initcall##level##_start = .; \
803 KEEP(*(.initcall##level##.init)) \
804 KEEP(*(.initcall##level##s.init)) \
805
806#define INIT_CALLS \
807 __initcall_start = .; \
808 KEEP(*(.initcallearly.init)) \
809 INIT_CALLS_LEVEL(0) \
810 INIT_CALLS_LEVEL(1) \
811 INIT_CALLS_LEVEL(2) \
812 INIT_CALLS_LEVEL(3) \
813 INIT_CALLS_LEVEL(4) \
814 INIT_CALLS_LEVEL(5) \
815 INIT_CALLS_LEVEL(rootfs) \
816 INIT_CALLS_LEVEL(6) \
817 INIT_CALLS_LEVEL(7) \
818 __initcall_end = .;
819
820#define CON_INITCALL \
821 __con_initcall_start = .; \
822 KEEP(*(.con_initcall.init)) \
823 __con_initcall_end = .;
824
825#ifdef CONFIG_BLK_DEV_INITRD
826#define INIT_RAM_FS \
827 . = ALIGN(4); \
828 __initramfs_start = .; \
829 KEEP(*(.init.ramfs)) \
830 . = ALIGN(8); \
831 KEEP(*(.init.ramfs.info))
832#else
833#define INIT_RAM_FS
834#endif
835
836/*
837 * Memory encryption operates on a page basis. Since we need to clear
838 * the memory encryption mask for this section, it needs to be aligned
839 * on a page boundary and be a page-size multiple in length.
840 *
841 * Note: We use a separate section so that only this section gets
842 * decrypted to avoid exposing more than we wish.
843 */
844#ifdef CONFIG_AMD_MEM_ENCRYPT
845#define PERCPU_DECRYPTED_SECTION \
846 . = ALIGN(PAGE_SIZE); \
847 *(.data..percpu..decrypted) \
848 . = ALIGN(PAGE_SIZE);
849#else
850#define PERCPU_DECRYPTED_SECTION
851#endif
852
853
854/*
855 * Default discarded sections.
856 *
857 * Some archs want to discard exit text/data at runtime rather than
858 * link time due to cross-section references such as alt instructions,
859 * bug table, eh_frame, etc. DISCARDS must be the last of output
860 * section definitions so that such archs put those in earlier section
861 * definitions.
862 */
863#define DISCARDS \
864 /DISCARD/ : { \
865 EXIT_TEXT \
866 EXIT_DATA \
867 EXIT_CALL \
868 *(.discard) \
869 *(.discard.*) \
870 *(.modinfo) \
871 }
872
873/**
874 * PERCPU_INPUT - the percpu input sections
875 * @cacheline: cacheline size
876 *
877 * The core percpu section names and core symbols which do not rely
878 * directly upon load addresses.
879 *
880 * @cacheline is used to align subsections to avoid false cacheline
881 * sharing between subsections for different purposes.
882 */
883#define PERCPU_INPUT(cacheline) \
884 __per_cpu_start = .; \
885 *(.data..percpu..first) \
886 . = ALIGN(PAGE_SIZE); \
887 *(.data..percpu..page_aligned) \
888 . = ALIGN(cacheline); \
889 *(.data..percpu..read_mostly) \
890 . = ALIGN(cacheline); \
891 *(.data..percpu) \
892 *(.data..percpu..shared_aligned) \
893 PERCPU_DECRYPTED_SECTION \
894 __per_cpu_end = .;
895
896/**
897 * PERCPU_VADDR - define output section for percpu area
898 * @cacheline: cacheline size
899 * @vaddr: explicit base address (optional)
900 * @phdr: destination PHDR (optional)
901 *
902 * Macro which expands to output section for percpu area.
903 *
904 * @cacheline is used to align subsections to avoid false cacheline
905 * sharing between subsections for different purposes.
906 *
907 * If @vaddr is not blank, it specifies explicit base address and all
908 * percpu symbols will be offset from the given address. If blank,
909 * @vaddr always equals @laddr + LOAD_OFFSET.
910 *
911 * @phdr defines the output PHDR to use if not blank. Be warned that
912 * output PHDR is sticky. If @phdr is specified, the next output
913 * section in the linker script will go there too. @phdr should have
914 * a leading colon.
915 *
916 * Note that this macros defines __per_cpu_load as an absolute symbol.
917 * If there is no need to put the percpu section at a predetermined
918 * address, use PERCPU_SECTION.
919 */
920#define PERCPU_VADDR(cacheline, vaddr, phdr) \
921 __per_cpu_load = .; \
922 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \
923 PERCPU_INPUT(cacheline) \
924 } phdr \
925 . = __per_cpu_load + SIZEOF(.data..percpu);
926
927/**
928 * PERCPU_SECTION - define output section for percpu area, simple version
929 * @cacheline: cacheline size
930 *
931 * Align to PAGE_SIZE and outputs output section for percpu area. This
932 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
933 * __per_cpu_start will be identical.
934 *
935 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
936 * except that __per_cpu_load is defined as a relative symbol against
937 * .data..percpu which is required for relocatable x86_32 configuration.
938 */
939#define PERCPU_SECTION(cacheline) \
940 . = ALIGN(PAGE_SIZE); \
941 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
942 __per_cpu_load = .; \
943 PERCPU_INPUT(cacheline) \
944 }
945
946
947/*
948 * Definition of the high level *_SECTION macros
949 * They will fit only a subset of the architectures
950 */
951
952
953/*
954 * Writeable data.
955 * All sections are combined in a single .data section.
956 * The sections following CONSTRUCTORS are arranged so their
957 * typical alignment matches.
958 * A cacheline is typical/always less than a PAGE_SIZE so
959 * the sections that has this restriction (or similar)
960 * is located before the ones requiring PAGE_SIZE alignment.
961 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
962 * matches the requirement of PAGE_ALIGNED_DATA.
963 *
964 * use 0 as page_align if page_aligned data is not used */
965#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
966 . = ALIGN(PAGE_SIZE); \
967 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
968 INIT_TASK_DATA(inittask) \
969 NOSAVE_DATA \
970 PAGE_ALIGNED_DATA(pagealigned) \
971 CACHELINE_ALIGNED_DATA(cacheline) \
972 READ_MOSTLY_DATA(cacheline) \
973 DATA_DATA \
974 CONSTRUCTORS \
975 } \
976 BUG_TABLE \
977
978#define INIT_TEXT_SECTION(inittext_align) \
979 . = ALIGN(inittext_align); \
980 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
981 _sinittext = .; \
982 INIT_TEXT \
983 _einittext = .; \
984 }
985
986#define INIT_DATA_SECTION(initsetup_align) \
987 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
988 INIT_DATA \
989 INIT_SETUP(initsetup_align) \
990 INIT_CALLS \
991 CON_INITCALL \
992 INIT_RAM_FS \
993 }
994
995#define BSS_SECTION(sbss_align, bss_align, stop_align) \
996 . = ALIGN(sbss_align); \
997 __bss_start = .; \
998 SBSS(sbss_align) \
999 BSS(bss_align) \
1000 . = ALIGN(stop_align); \
1001 __bss_stop = .;
1/*
2 * Helper macros to support writing architecture specific
3 * linker scripts.
4 *
5 * A minimal linker scripts has following content:
6 * [This is a sample, architectures may have special requiriements]
7 *
8 * OUTPUT_FORMAT(...)
9 * OUTPUT_ARCH(...)
10 * ENTRY(...)
11 * SECTIONS
12 * {
13 * . = START;
14 * __init_begin = .;
15 * HEAD_TEXT_SECTION
16 * INIT_TEXT_SECTION(PAGE_SIZE)
17 * INIT_DATA_SECTION(...)
18 * PERCPU_SECTION(CACHELINE_SIZE)
19 * __init_end = .;
20 *
21 * _stext = .;
22 * TEXT_SECTION = 0
23 * _etext = .;
24 *
25 * _sdata = .;
26 * RO_DATA(PAGE_SIZE)
27 * RW_DATA(...)
28 * _edata = .;
29 *
30 * EXCEPTION_TABLE(...)
31 *
32 * BSS_SECTION(0, 0, 0)
33 * _end = .;
34 *
35 * STABS_DEBUG
36 * DWARF_DEBUG
37 * ELF_DETAILS
38 *
39 * DISCARDS // must be the last
40 * }
41 *
42 * [__init_begin, __init_end] is the init section that may be freed after init
43 * // __init_begin and __init_end should be page aligned, so that we can
44 * // free the whole .init memory
45 * [_stext, _etext] is the text section
46 * [_sdata, _edata] is the data section
47 *
48 * Some of the included output section have their own set of constants.
49 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
50 * [__nosave_begin, __nosave_end] for the nosave data
51 */
52
53#ifndef LOAD_OFFSET
54#define LOAD_OFFSET 0
55#endif
56
57/*
58 * Only some architectures want to have the .notes segment visible in
59 * a separate PT_NOTE ELF Program Header. When this happens, it needs
60 * to be visible in both the kernel text's PT_LOAD and the PT_NOTE
61 * Program Headers. In this case, though, the PT_LOAD needs to be made
62 * the default again so that all the following sections don't also end
63 * up in the PT_NOTE Program Header.
64 */
65#ifdef EMITS_PT_NOTE
66#define NOTES_HEADERS :text :note
67#define NOTES_HEADERS_RESTORE __restore_ph : { *(.__restore_ph) } :text
68#else
69#define NOTES_HEADERS
70#define NOTES_HEADERS_RESTORE
71#endif
72
73/*
74 * Some architectures have non-executable read-only exception tables.
75 * They can be added to the RO_DATA segment by specifying their desired
76 * alignment.
77 */
78#ifdef RO_EXCEPTION_TABLE_ALIGN
79#define RO_EXCEPTION_TABLE EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN)
80#else
81#define RO_EXCEPTION_TABLE
82#endif
83
84/* Align . to a 8 byte boundary equals to maximum function alignment. */
85#define ALIGN_FUNCTION() . = ALIGN(8)
86
87/*
88 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
89 * generates .data.identifier sections, which need to be pulled in with
90 * .data. We don't want to pull in .data..other sections, which Linux
91 * has defined. Same for text and bss.
92 *
93 * With LTO_CLANG, the linker also splits sections by default, so we need
94 * these macros to combine the sections during the final link.
95 *
96 * RODATA_MAIN is not used because existing code already defines .rodata.x
97 * sections to be brought in with rodata.
98 */
99#if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG)
100#define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
101#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L*
102#define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
103#define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L*
104#define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral*
105#define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
106#else
107#define TEXT_MAIN .text
108#define DATA_MAIN .data
109#define SDATA_MAIN .sdata
110#define RODATA_MAIN .rodata
111#define BSS_MAIN .bss
112#define SBSS_MAIN .sbss
113#endif
114
115/*
116 * GCC 4.5 and later have a 32 bytes section alignment for structures.
117 * Except GCC 4.9, that feels the need to align on 64 bytes.
118 */
119#if __GNUC__ == 4 && __GNUC_MINOR__ == 9
120#define STRUCT_ALIGNMENT 64
121#else
122#define STRUCT_ALIGNMENT 32
123#endif
124#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
125
126/*
127 * The order of the sched class addresses are important, as they are
128 * used to determine the order of the priority of each sched class in
129 * relation to each other.
130 */
131#define SCHED_DATA \
132 STRUCT_ALIGN(); \
133 __begin_sched_classes = .; \
134 *(__idle_sched_class) \
135 *(__fair_sched_class) \
136 *(__rt_sched_class) \
137 *(__dl_sched_class) \
138 *(__stop_sched_class) \
139 __end_sched_classes = .;
140
141/* The actual configuration determine if the init/exit sections
142 * are handled as text/data or they can be discarded (which
143 * often happens at runtime)
144 */
145#ifdef CONFIG_HOTPLUG_CPU
146#define CPU_KEEP(sec) *(.cpu##sec)
147#define CPU_DISCARD(sec)
148#else
149#define CPU_KEEP(sec)
150#define CPU_DISCARD(sec) *(.cpu##sec)
151#endif
152
153#if defined(CONFIG_MEMORY_HOTPLUG)
154#define MEM_KEEP(sec) *(.mem##sec)
155#define MEM_DISCARD(sec)
156#else
157#define MEM_KEEP(sec)
158#define MEM_DISCARD(sec) *(.mem##sec)
159#endif
160
161#ifdef CONFIG_FTRACE_MCOUNT_RECORD
162/*
163 * The ftrace call sites are logged to a section whose name depends on the
164 * compiler option used. A given kernel image will only use one, AKA
165 * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header
166 * dependencies for FTRACE_CALLSITE_SECTION's definition.
167 *
168 * Need to also make ftrace_stub_graph point to ftrace_stub
169 * so that the same stub location may have different protocols
170 * and not mess up with C verifiers.
171 */
172#define MCOUNT_REC() . = ALIGN(8); \
173 __start_mcount_loc = .; \
174 KEEP(*(__mcount_loc)) \
175 KEEP(*(__patchable_function_entries)) \
176 __stop_mcount_loc = .; \
177 ftrace_stub_graph = ftrace_stub;
178#else
179# ifdef CONFIG_FUNCTION_TRACER
180# define MCOUNT_REC() ftrace_stub_graph = ftrace_stub;
181# else
182# define MCOUNT_REC()
183# endif
184#endif
185
186#ifdef CONFIG_TRACE_BRANCH_PROFILING
187#define LIKELY_PROFILE() __start_annotated_branch_profile = .; \
188 KEEP(*(_ftrace_annotated_branch)) \
189 __stop_annotated_branch_profile = .;
190#else
191#define LIKELY_PROFILE()
192#endif
193
194#ifdef CONFIG_PROFILE_ALL_BRANCHES
195#define BRANCH_PROFILE() __start_branch_profile = .; \
196 KEEP(*(_ftrace_branch)) \
197 __stop_branch_profile = .;
198#else
199#define BRANCH_PROFILE()
200#endif
201
202#ifdef CONFIG_KPROBES
203#define KPROBE_BLACKLIST() . = ALIGN(8); \
204 __start_kprobe_blacklist = .; \
205 KEEP(*(_kprobe_blacklist)) \
206 __stop_kprobe_blacklist = .;
207#else
208#define KPROBE_BLACKLIST()
209#endif
210
211#ifdef CONFIG_FUNCTION_ERROR_INJECTION
212#define ERROR_INJECT_WHITELIST() STRUCT_ALIGN(); \
213 __start_error_injection_whitelist = .; \
214 KEEP(*(_error_injection_whitelist)) \
215 __stop_error_injection_whitelist = .;
216#else
217#define ERROR_INJECT_WHITELIST()
218#endif
219
220#ifdef CONFIG_EVENT_TRACING
221#define FTRACE_EVENTS() . = ALIGN(8); \
222 __start_ftrace_events = .; \
223 KEEP(*(_ftrace_events)) \
224 __stop_ftrace_events = .; \
225 __start_ftrace_eval_maps = .; \
226 KEEP(*(_ftrace_eval_map)) \
227 __stop_ftrace_eval_maps = .;
228#else
229#define FTRACE_EVENTS()
230#endif
231
232#ifdef CONFIG_TRACING
233#define TRACE_PRINTKS() __start___trace_bprintk_fmt = .; \
234 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
235 __stop___trace_bprintk_fmt = .;
236#define TRACEPOINT_STR() __start___tracepoint_str = .; \
237 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
238 __stop___tracepoint_str = .;
239#else
240#define TRACE_PRINTKS()
241#define TRACEPOINT_STR()
242#endif
243
244#ifdef CONFIG_FTRACE_SYSCALLS
245#define TRACE_SYSCALLS() . = ALIGN(8); \
246 __start_syscalls_metadata = .; \
247 KEEP(*(__syscalls_metadata)) \
248 __stop_syscalls_metadata = .;
249#else
250#define TRACE_SYSCALLS()
251#endif
252
253#ifdef CONFIG_BPF_EVENTS
254#define BPF_RAW_TP() STRUCT_ALIGN(); \
255 __start__bpf_raw_tp = .; \
256 KEEP(*(__bpf_raw_tp_map)) \
257 __stop__bpf_raw_tp = .;
258#else
259#define BPF_RAW_TP()
260#endif
261
262#ifdef CONFIG_SERIAL_EARLYCON
263#define EARLYCON_TABLE() . = ALIGN(8); \
264 __earlycon_table = .; \
265 KEEP(*(__earlycon_table)) \
266 __earlycon_table_end = .;
267#else
268#define EARLYCON_TABLE()
269#endif
270
271#ifdef CONFIG_SECURITY
272#define LSM_TABLE() . = ALIGN(8); \
273 __start_lsm_info = .; \
274 KEEP(*(.lsm_info.init)) \
275 __end_lsm_info = .;
276#define EARLY_LSM_TABLE() . = ALIGN(8); \
277 __start_early_lsm_info = .; \
278 KEEP(*(.early_lsm_info.init)) \
279 __end_early_lsm_info = .;
280#else
281#define LSM_TABLE()
282#define EARLY_LSM_TABLE()
283#endif
284
285#define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
286#define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
287#define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name)
288#define _OF_TABLE_0(name)
289#define _OF_TABLE_1(name) \
290 . = ALIGN(8); \
291 __##name##_of_table = .; \
292 KEEP(*(__##name##_of_table)) \
293 KEEP(*(__##name##_of_table_end))
294
295#define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer)
296#define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
297#define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
298#define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
299#define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
300#define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
301
302#ifdef CONFIG_ACPI
303#define ACPI_PROBE_TABLE(name) \
304 . = ALIGN(8); \
305 __##name##_acpi_probe_table = .; \
306 KEEP(*(__##name##_acpi_probe_table)) \
307 __##name##_acpi_probe_table_end = .;
308#else
309#define ACPI_PROBE_TABLE(name)
310#endif
311
312#ifdef CONFIG_THERMAL
313#define THERMAL_TABLE(name) \
314 . = ALIGN(8); \
315 __##name##_thermal_table = .; \
316 KEEP(*(__##name##_thermal_table)) \
317 __##name##_thermal_table_end = .;
318#else
319#define THERMAL_TABLE(name)
320#endif
321
322#ifdef CONFIG_DTPM
323#define DTPM_TABLE() \
324 . = ALIGN(8); \
325 __dtpm_table = .; \
326 KEEP(*(__dtpm_table)) \
327 __dtpm_table_end = .;
328#else
329#define DTPM_TABLE()
330#endif
331
332#define KERNEL_DTB() \
333 STRUCT_ALIGN(); \
334 __dtb_start = .; \
335 KEEP(*(.dtb.init.rodata)) \
336 __dtb_end = .;
337
338/*
339 * .data section
340 */
341#define DATA_DATA \
342 *(.xiptext) \
343 *(DATA_MAIN) \
344 *(.ref.data) \
345 *(.data..shared_aligned) /* percpu related */ \
346 MEM_KEEP(init.data*) \
347 MEM_KEEP(exit.data*) \
348 *(.data.unlikely) \
349 __start_once = .; \
350 *(.data.once) \
351 __end_once = .; \
352 STRUCT_ALIGN(); \
353 *(__tracepoints) \
354 /* implement dynamic printk debug */ \
355 . = ALIGN(8); \
356 __start___dyndbg = .; \
357 KEEP(*(__dyndbg)) \
358 __stop___dyndbg = .; \
359 LIKELY_PROFILE() \
360 BRANCH_PROFILE() \
361 TRACE_PRINTKS() \
362 BPF_RAW_TP() \
363 TRACEPOINT_STR()
364
365/*
366 * Data section helpers
367 */
368#define NOSAVE_DATA \
369 . = ALIGN(PAGE_SIZE); \
370 __nosave_begin = .; \
371 *(.data..nosave) \
372 . = ALIGN(PAGE_SIZE); \
373 __nosave_end = .;
374
375#define PAGE_ALIGNED_DATA(page_align) \
376 . = ALIGN(page_align); \
377 *(.data..page_aligned) \
378 . = ALIGN(page_align);
379
380#define READ_MOSTLY_DATA(align) \
381 . = ALIGN(align); \
382 *(.data..read_mostly) \
383 . = ALIGN(align);
384
385#define CACHELINE_ALIGNED_DATA(align) \
386 . = ALIGN(align); \
387 *(.data..cacheline_aligned)
388
389#define INIT_TASK_DATA(align) \
390 . = ALIGN(align); \
391 __start_init_task = .; \
392 init_thread_union = .; \
393 init_stack = .; \
394 KEEP(*(.data..init_task)) \
395 KEEP(*(.data..init_thread_info)) \
396 . = __start_init_task + THREAD_SIZE; \
397 __end_init_task = .;
398
399#define JUMP_TABLE_DATA \
400 . = ALIGN(8); \
401 __start___jump_table = .; \
402 KEEP(*(__jump_table)) \
403 __stop___jump_table = .;
404
405#define STATIC_CALL_DATA \
406 . = ALIGN(8); \
407 __start_static_call_sites = .; \
408 KEEP(*(.static_call_sites)) \
409 __stop_static_call_sites = .; \
410 __start_static_call_tramp_key = .; \
411 KEEP(*(.static_call_tramp_key)) \
412 __stop_static_call_tramp_key = .;
413
414/*
415 * Allow architectures to handle ro_after_init data on their
416 * own by defining an empty RO_AFTER_INIT_DATA.
417 */
418#ifndef RO_AFTER_INIT_DATA
419#define RO_AFTER_INIT_DATA \
420 . = ALIGN(8); \
421 __start_ro_after_init = .; \
422 *(.data..ro_after_init) \
423 JUMP_TABLE_DATA \
424 STATIC_CALL_DATA \
425 __end_ro_after_init = .;
426#endif
427
428/*
429 * Read only Data
430 */
431#define RO_DATA(align) \
432 . = ALIGN((align)); \
433 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
434 __start_rodata = .; \
435 *(.rodata) *(.rodata.*) \
436 SCHED_DATA \
437 RO_AFTER_INIT_DATA /* Read only after init */ \
438 . = ALIGN(8); \
439 __start___tracepoints_ptrs = .; \
440 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
441 __stop___tracepoints_ptrs = .; \
442 *(__tracepoints_strings)/* Tracepoints: strings */ \
443 } \
444 \
445 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
446 *(.rodata1) \
447 } \
448 \
449 /* PCI quirks */ \
450 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
451 __start_pci_fixups_early = .; \
452 KEEP(*(.pci_fixup_early)) \
453 __end_pci_fixups_early = .; \
454 __start_pci_fixups_header = .; \
455 KEEP(*(.pci_fixup_header)) \
456 __end_pci_fixups_header = .; \
457 __start_pci_fixups_final = .; \
458 KEEP(*(.pci_fixup_final)) \
459 __end_pci_fixups_final = .; \
460 __start_pci_fixups_enable = .; \
461 KEEP(*(.pci_fixup_enable)) \
462 __end_pci_fixups_enable = .; \
463 __start_pci_fixups_resume = .; \
464 KEEP(*(.pci_fixup_resume)) \
465 __end_pci_fixups_resume = .; \
466 __start_pci_fixups_resume_early = .; \
467 KEEP(*(.pci_fixup_resume_early)) \
468 __end_pci_fixups_resume_early = .; \
469 __start_pci_fixups_suspend = .; \
470 KEEP(*(.pci_fixup_suspend)) \
471 __end_pci_fixups_suspend = .; \
472 __start_pci_fixups_suspend_late = .; \
473 KEEP(*(.pci_fixup_suspend_late)) \
474 __end_pci_fixups_suspend_late = .; \
475 } \
476 \
477 /* Built-in firmware blobs */ \
478 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) { \
479 __start_builtin_fw = .; \
480 KEEP(*(.builtin_fw)) \
481 __end_builtin_fw = .; \
482 } \
483 \
484 TRACEDATA \
485 \
486 /* Kernel symbol table: Normal symbols */ \
487 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
488 __start___ksymtab = .; \
489 KEEP(*(SORT(___ksymtab+*))) \
490 __stop___ksymtab = .; \
491 } \
492 \
493 /* Kernel symbol table: GPL-only symbols */ \
494 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
495 __start___ksymtab_gpl = .; \
496 KEEP(*(SORT(___ksymtab_gpl+*))) \
497 __stop___ksymtab_gpl = .; \
498 } \
499 \
500 /* Kernel symbol table: Normal symbols */ \
501 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
502 __start___kcrctab = .; \
503 KEEP(*(SORT(___kcrctab+*))) \
504 __stop___kcrctab = .; \
505 } \
506 \
507 /* Kernel symbol table: GPL-only symbols */ \
508 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
509 __start___kcrctab_gpl = .; \
510 KEEP(*(SORT(___kcrctab_gpl+*))) \
511 __stop___kcrctab_gpl = .; \
512 } \
513 \
514 /* Kernel symbol table: strings */ \
515 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
516 *(__ksymtab_strings) \
517 } \
518 \
519 /* __*init sections */ \
520 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
521 *(.ref.rodata) \
522 MEM_KEEP(init.rodata) \
523 MEM_KEEP(exit.rodata) \
524 } \
525 \
526 /* Built-in module parameters. */ \
527 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
528 __start___param = .; \
529 KEEP(*(__param)) \
530 __stop___param = .; \
531 } \
532 \
533 /* Built-in module versions. */ \
534 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
535 __start___modver = .; \
536 KEEP(*(__modver)) \
537 __stop___modver = .; \
538 } \
539 \
540 RO_EXCEPTION_TABLE \
541 NOTES \
542 BTF \
543 \
544 . = ALIGN((align)); \
545 __end_rodata = .;
546
547
548/*
549 * .text..L.cfi.jumptable.* contain Control-Flow Integrity (CFI)
550 * jump table entries.
551 */
552#ifdef CONFIG_CFI_CLANG
553#define TEXT_CFI_JT \
554 . = ALIGN(PMD_SIZE); \
555 __cfi_jt_start = .; \
556 *(.text..L.cfi.jumptable .text..L.cfi.jumptable.*) \
557 . = ALIGN(PMD_SIZE); \
558 __cfi_jt_end = .;
559#else
560#define TEXT_CFI_JT
561#endif
562
563/*
564 * Non-instrumentable text section
565 */
566#define NOINSTR_TEXT \
567 ALIGN_FUNCTION(); \
568 __noinstr_text_start = .; \
569 *(.noinstr.text) \
570 __noinstr_text_end = .;
571
572/*
573 * .text section. Map to function alignment to avoid address changes
574 * during second ld run in second ld pass when generating System.map
575 *
576 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
577 * code elimination is enabled, so these sections should be converted
578 * to use ".." first.
579 */
580#define TEXT_TEXT \
581 ALIGN_FUNCTION(); \
582 *(.text.hot .text.hot.*) \
583 *(TEXT_MAIN .text.fixup) \
584 *(.text.unlikely .text.unlikely.*) \
585 *(.text.unknown .text.unknown.*) \
586 NOINSTR_TEXT \
587 *(.text..refcount) \
588 *(.ref.text) \
589 *(.text.asan.* .text.tsan.*) \
590 TEXT_CFI_JT \
591 MEM_KEEP(init.text*) \
592 MEM_KEEP(exit.text*) \
593
594
595/* sched.text is aling to function alignment to secure we have same
596 * address even at second ld pass when generating System.map */
597#define SCHED_TEXT \
598 ALIGN_FUNCTION(); \
599 __sched_text_start = .; \
600 *(.sched.text) \
601 __sched_text_end = .;
602
603/* spinlock.text is aling to function alignment to secure we have same
604 * address even at second ld pass when generating System.map */
605#define LOCK_TEXT \
606 ALIGN_FUNCTION(); \
607 __lock_text_start = .; \
608 *(.spinlock.text) \
609 __lock_text_end = .;
610
611#define CPUIDLE_TEXT \
612 ALIGN_FUNCTION(); \
613 __cpuidle_text_start = .; \
614 *(.cpuidle.text) \
615 __cpuidle_text_end = .;
616
617#define KPROBES_TEXT \
618 ALIGN_FUNCTION(); \
619 __kprobes_text_start = .; \
620 *(.kprobes.text) \
621 __kprobes_text_end = .;
622
623#define ENTRY_TEXT \
624 ALIGN_FUNCTION(); \
625 __entry_text_start = .; \
626 *(.entry.text) \
627 __entry_text_end = .;
628
629#define IRQENTRY_TEXT \
630 ALIGN_FUNCTION(); \
631 __irqentry_text_start = .; \
632 *(.irqentry.text) \
633 __irqentry_text_end = .;
634
635#define SOFTIRQENTRY_TEXT \
636 ALIGN_FUNCTION(); \
637 __softirqentry_text_start = .; \
638 *(.softirqentry.text) \
639 __softirqentry_text_end = .;
640
641#define STATIC_CALL_TEXT \
642 ALIGN_FUNCTION(); \
643 __static_call_text_start = .; \
644 *(.static_call.text) \
645 __static_call_text_end = .;
646
647/* Section used for early init (in .S files) */
648#define HEAD_TEXT KEEP(*(.head.text))
649
650#define HEAD_TEXT_SECTION \
651 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
652 HEAD_TEXT \
653 }
654
655/*
656 * Exception table
657 */
658#define EXCEPTION_TABLE(align) \
659 . = ALIGN(align); \
660 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
661 __start___ex_table = .; \
662 KEEP(*(__ex_table)) \
663 __stop___ex_table = .; \
664 }
665
666/*
667 * .BTF
668 */
669#ifdef CONFIG_DEBUG_INFO_BTF
670#define BTF \
671 .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \
672 __start_BTF = .; \
673 KEEP(*(.BTF)) \
674 __stop_BTF = .; \
675 } \
676 . = ALIGN(4); \
677 .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \
678 *(.BTF_ids) \
679 }
680#else
681#define BTF
682#endif
683
684/*
685 * Init task
686 */
687#define INIT_TASK_DATA_SECTION(align) \
688 . = ALIGN(align); \
689 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
690 INIT_TASK_DATA(align) \
691 }
692
693#ifdef CONFIG_CONSTRUCTORS
694#define KERNEL_CTORS() . = ALIGN(8); \
695 __ctors_start = .; \
696 KEEP(*(SORT(.ctors.*))) \
697 KEEP(*(.ctors)) \
698 KEEP(*(SORT(.init_array.*))) \
699 KEEP(*(.init_array)) \
700 __ctors_end = .;
701#else
702#define KERNEL_CTORS()
703#endif
704
705/* init and exit section handling */
706#define INIT_DATA \
707 KEEP(*(SORT(___kentry+*))) \
708 *(.init.data init.data.*) \
709 MEM_DISCARD(init.data*) \
710 KERNEL_CTORS() \
711 MCOUNT_REC() \
712 *(.init.rodata .init.rodata.*) \
713 FTRACE_EVENTS() \
714 TRACE_SYSCALLS() \
715 KPROBE_BLACKLIST() \
716 ERROR_INJECT_WHITELIST() \
717 MEM_DISCARD(init.rodata) \
718 CLK_OF_TABLES() \
719 RESERVEDMEM_OF_TABLES() \
720 TIMER_OF_TABLES() \
721 CPU_METHOD_OF_TABLES() \
722 CPUIDLE_METHOD_OF_TABLES() \
723 KERNEL_DTB() \
724 IRQCHIP_OF_MATCH_TABLE() \
725 ACPI_PROBE_TABLE(irqchip) \
726 ACPI_PROBE_TABLE(timer) \
727 THERMAL_TABLE(governor) \
728 DTPM_TABLE() \
729 EARLYCON_TABLE() \
730 LSM_TABLE() \
731 EARLY_LSM_TABLE() \
732 KUNIT_TABLE()
733
734#define INIT_TEXT \
735 *(.init.text .init.text.*) \
736 *(.text.startup) \
737 MEM_DISCARD(init.text*)
738
739#define EXIT_DATA \
740 *(.exit.data .exit.data.*) \
741 *(.fini_array .fini_array.*) \
742 *(.dtors .dtors.*) \
743 MEM_DISCARD(exit.data*) \
744 MEM_DISCARD(exit.rodata*)
745
746#define EXIT_TEXT \
747 *(.exit.text) \
748 *(.text.exit) \
749 MEM_DISCARD(exit.text)
750
751#define EXIT_CALL \
752 *(.exitcall.exit)
753
754/*
755 * bss (Block Started by Symbol) - uninitialized data
756 * zeroed during startup
757 */
758#define SBSS(sbss_align) \
759 . = ALIGN(sbss_align); \
760 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
761 *(.dynsbss) \
762 *(SBSS_MAIN) \
763 *(.scommon) \
764 }
765
766/*
767 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
768 * sections to the front of bss.
769 */
770#ifndef BSS_FIRST_SECTIONS
771#define BSS_FIRST_SECTIONS
772#endif
773
774#define BSS(bss_align) \
775 . = ALIGN(bss_align); \
776 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
777 BSS_FIRST_SECTIONS \
778 . = ALIGN(PAGE_SIZE); \
779 *(.bss..page_aligned) \
780 . = ALIGN(PAGE_SIZE); \
781 *(.dynbss) \
782 *(BSS_MAIN) \
783 *(COMMON) \
784 }
785
786/*
787 * DWARF debug sections.
788 * Symbols in the DWARF debugging sections are relative to
789 * the beginning of the section so we begin them at 0.
790 */
791#define DWARF_DEBUG \
792 /* DWARF 1 */ \
793 .debug 0 : { *(.debug) } \
794 .line 0 : { *(.line) } \
795 /* GNU DWARF 1 extensions */ \
796 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
797 .debug_sfnames 0 : { *(.debug_sfnames) } \
798 /* DWARF 1.1 and DWARF 2 */ \
799 .debug_aranges 0 : { *(.debug_aranges) } \
800 .debug_pubnames 0 : { *(.debug_pubnames) } \
801 /* DWARF 2 */ \
802 .debug_info 0 : { *(.debug_info \
803 .gnu.linkonce.wi.*) } \
804 .debug_abbrev 0 : { *(.debug_abbrev) } \
805 .debug_line 0 : { *(.debug_line) } \
806 .debug_frame 0 : { *(.debug_frame) } \
807 .debug_str 0 : { *(.debug_str) } \
808 .debug_loc 0 : { *(.debug_loc) } \
809 .debug_macinfo 0 : { *(.debug_macinfo) } \
810 .debug_pubtypes 0 : { *(.debug_pubtypes) } \
811 /* DWARF 3 */ \
812 .debug_ranges 0 : { *(.debug_ranges) } \
813 /* SGI/MIPS DWARF 2 extensions */ \
814 .debug_weaknames 0 : { *(.debug_weaknames) } \
815 .debug_funcnames 0 : { *(.debug_funcnames) } \
816 .debug_typenames 0 : { *(.debug_typenames) } \
817 .debug_varnames 0 : { *(.debug_varnames) } \
818 /* GNU DWARF 2 extensions */ \
819 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
820 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
821 /* DWARF 4 */ \
822 .debug_types 0 : { *(.debug_types) } \
823 /* DWARF 5 */ \
824 .debug_addr 0 : { *(.debug_addr) } \
825 .debug_line_str 0 : { *(.debug_line_str) } \
826 .debug_loclists 0 : { *(.debug_loclists) } \
827 .debug_macro 0 : { *(.debug_macro) } \
828 .debug_names 0 : { *(.debug_names) } \
829 .debug_rnglists 0 : { *(.debug_rnglists) } \
830 .debug_str_offsets 0 : { *(.debug_str_offsets) }
831
832/* Stabs debugging sections. */
833#define STABS_DEBUG \
834 .stab 0 : { *(.stab) } \
835 .stabstr 0 : { *(.stabstr) } \
836 .stab.excl 0 : { *(.stab.excl) } \
837 .stab.exclstr 0 : { *(.stab.exclstr) } \
838 .stab.index 0 : { *(.stab.index) } \
839 .stab.indexstr 0 : { *(.stab.indexstr) }
840
841/* Required sections not related to debugging. */
842#define ELF_DETAILS \
843 .comment 0 : { *(.comment) } \
844 .symtab 0 : { *(.symtab) } \
845 .strtab 0 : { *(.strtab) } \
846 .shstrtab 0 : { *(.shstrtab) }
847
848#ifdef CONFIG_GENERIC_BUG
849#define BUG_TABLE \
850 . = ALIGN(8); \
851 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
852 __start___bug_table = .; \
853 KEEP(*(__bug_table)) \
854 __stop___bug_table = .; \
855 }
856#else
857#define BUG_TABLE
858#endif
859
860#ifdef CONFIG_UNWINDER_ORC
861#define ORC_UNWIND_TABLE \
862 . = ALIGN(4); \
863 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \
864 __start_orc_unwind_ip = .; \
865 KEEP(*(.orc_unwind_ip)) \
866 __stop_orc_unwind_ip = .; \
867 } \
868 . = ALIGN(2); \
869 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \
870 __start_orc_unwind = .; \
871 KEEP(*(.orc_unwind)) \
872 __stop_orc_unwind = .; \
873 } \
874 . = ALIGN(4); \
875 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \
876 orc_lookup = .; \
877 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \
878 LOOKUP_BLOCK_SIZE) + 1) * 4; \
879 orc_lookup_end = .; \
880 }
881#else
882#define ORC_UNWIND_TABLE
883#endif
884
885#ifdef CONFIG_PM_TRACE
886#define TRACEDATA \
887 . = ALIGN(4); \
888 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
889 __tracedata_start = .; \
890 KEEP(*(.tracedata)) \
891 __tracedata_end = .; \
892 }
893#else
894#define TRACEDATA
895#endif
896
897#define NOTES \
898 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
899 __start_notes = .; \
900 KEEP(*(.note.*)) \
901 __stop_notes = .; \
902 } NOTES_HEADERS \
903 NOTES_HEADERS_RESTORE
904
905#define INIT_SETUP(initsetup_align) \
906 . = ALIGN(initsetup_align); \
907 __setup_start = .; \
908 KEEP(*(.init.setup)) \
909 __setup_end = .;
910
911#define INIT_CALLS_LEVEL(level) \
912 __initcall##level##_start = .; \
913 KEEP(*(.initcall##level##.init)) \
914 KEEP(*(.initcall##level##s.init)) \
915
916#define INIT_CALLS \
917 __initcall_start = .; \
918 KEEP(*(.initcallearly.init)) \
919 INIT_CALLS_LEVEL(0) \
920 INIT_CALLS_LEVEL(1) \
921 INIT_CALLS_LEVEL(2) \
922 INIT_CALLS_LEVEL(3) \
923 INIT_CALLS_LEVEL(4) \
924 INIT_CALLS_LEVEL(5) \
925 INIT_CALLS_LEVEL(rootfs) \
926 INIT_CALLS_LEVEL(6) \
927 INIT_CALLS_LEVEL(7) \
928 __initcall_end = .;
929
930#define CON_INITCALL \
931 __con_initcall_start = .; \
932 KEEP(*(.con_initcall.init)) \
933 __con_initcall_end = .;
934
935/* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
936#define KUNIT_TABLE() \
937 . = ALIGN(8); \
938 __kunit_suites_start = .; \
939 KEEP(*(.kunit_test_suites)) \
940 __kunit_suites_end = .;
941
942#ifdef CONFIG_BLK_DEV_INITRD
943#define INIT_RAM_FS \
944 . = ALIGN(4); \
945 __initramfs_start = .; \
946 KEEP(*(.init.ramfs)) \
947 . = ALIGN(8); \
948 KEEP(*(.init.ramfs.info))
949#else
950#define INIT_RAM_FS
951#endif
952
953/*
954 * Memory encryption operates on a page basis. Since we need to clear
955 * the memory encryption mask for this section, it needs to be aligned
956 * on a page boundary and be a page-size multiple in length.
957 *
958 * Note: We use a separate section so that only this section gets
959 * decrypted to avoid exposing more than we wish.
960 */
961#ifdef CONFIG_AMD_MEM_ENCRYPT
962#define PERCPU_DECRYPTED_SECTION \
963 . = ALIGN(PAGE_SIZE); \
964 *(.data..decrypted) \
965 *(.data..percpu..decrypted) \
966 . = ALIGN(PAGE_SIZE);
967#else
968#define PERCPU_DECRYPTED_SECTION
969#endif
970
971
972/*
973 * Default discarded sections.
974 *
975 * Some archs want to discard exit text/data at runtime rather than
976 * link time due to cross-section references such as alt instructions,
977 * bug table, eh_frame, etc. DISCARDS must be the last of output
978 * section definitions so that such archs put those in earlier section
979 * definitions.
980 */
981#ifdef RUNTIME_DISCARD_EXIT
982#define EXIT_DISCARDS
983#else
984#define EXIT_DISCARDS \
985 EXIT_TEXT \
986 EXIT_DATA
987#endif
988
989/*
990 * Clang's -fprofile-arcs, -fsanitize=kernel-address, and
991 * -fsanitize=thread produce unwanted sections (.eh_frame
992 * and .init_array.*), but CONFIG_CONSTRUCTORS wants to
993 * keep any .init_array.* sections.
994 * https://bugs.llvm.org/show_bug.cgi?id=46478
995 */
996#if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) || \
997 defined(CONFIG_CFI_CLANG)
998# ifdef CONFIG_CONSTRUCTORS
999# define SANITIZER_DISCARDS \
1000 *(.eh_frame)
1001# else
1002# define SANITIZER_DISCARDS \
1003 *(.init_array) *(.init_array.*) \
1004 *(.eh_frame)
1005# endif
1006#else
1007# define SANITIZER_DISCARDS
1008#endif
1009
1010#define COMMON_DISCARDS \
1011 SANITIZER_DISCARDS \
1012 *(.discard) \
1013 *(.discard.*) \
1014 *(.modinfo) \
1015 /* ld.bfd warns about .gnu.version* even when not emitted */ \
1016 *(.gnu.version*) \
1017
1018#define DISCARDS \
1019 /DISCARD/ : { \
1020 EXIT_DISCARDS \
1021 EXIT_CALL \
1022 COMMON_DISCARDS \
1023 }
1024
1025/**
1026 * PERCPU_INPUT - the percpu input sections
1027 * @cacheline: cacheline size
1028 *
1029 * The core percpu section names and core symbols which do not rely
1030 * directly upon load addresses.
1031 *
1032 * @cacheline is used to align subsections to avoid false cacheline
1033 * sharing between subsections for different purposes.
1034 */
1035#define PERCPU_INPUT(cacheline) \
1036 __per_cpu_start = .; \
1037 *(.data..percpu..first) \
1038 . = ALIGN(PAGE_SIZE); \
1039 *(.data..percpu..page_aligned) \
1040 . = ALIGN(cacheline); \
1041 *(.data..percpu..read_mostly) \
1042 . = ALIGN(cacheline); \
1043 *(.data..percpu) \
1044 *(.data..percpu..shared_aligned) \
1045 PERCPU_DECRYPTED_SECTION \
1046 __per_cpu_end = .;
1047
1048/**
1049 * PERCPU_VADDR - define output section for percpu area
1050 * @cacheline: cacheline size
1051 * @vaddr: explicit base address (optional)
1052 * @phdr: destination PHDR (optional)
1053 *
1054 * Macro which expands to output section for percpu area.
1055 *
1056 * @cacheline is used to align subsections to avoid false cacheline
1057 * sharing between subsections for different purposes.
1058 *
1059 * If @vaddr is not blank, it specifies explicit base address and all
1060 * percpu symbols will be offset from the given address. If blank,
1061 * @vaddr always equals @laddr + LOAD_OFFSET.
1062 *
1063 * @phdr defines the output PHDR to use if not blank. Be warned that
1064 * output PHDR is sticky. If @phdr is specified, the next output
1065 * section in the linker script will go there too. @phdr should have
1066 * a leading colon.
1067 *
1068 * Note that this macros defines __per_cpu_load as an absolute symbol.
1069 * If there is no need to put the percpu section at a predetermined
1070 * address, use PERCPU_SECTION.
1071 */
1072#define PERCPU_VADDR(cacheline, vaddr, phdr) \
1073 __per_cpu_load = .; \
1074 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \
1075 PERCPU_INPUT(cacheline) \
1076 } phdr \
1077 . = __per_cpu_load + SIZEOF(.data..percpu);
1078
1079/**
1080 * PERCPU_SECTION - define output section for percpu area, simple version
1081 * @cacheline: cacheline size
1082 *
1083 * Align to PAGE_SIZE and outputs output section for percpu area. This
1084 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
1085 * __per_cpu_start will be identical.
1086 *
1087 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
1088 * except that __per_cpu_load is defined as a relative symbol against
1089 * .data..percpu which is required for relocatable x86_32 configuration.
1090 */
1091#define PERCPU_SECTION(cacheline) \
1092 . = ALIGN(PAGE_SIZE); \
1093 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
1094 __per_cpu_load = .; \
1095 PERCPU_INPUT(cacheline) \
1096 }
1097
1098
1099/*
1100 * Definition of the high level *_SECTION macros
1101 * They will fit only a subset of the architectures
1102 */
1103
1104
1105/*
1106 * Writeable data.
1107 * All sections are combined in a single .data section.
1108 * The sections following CONSTRUCTORS are arranged so their
1109 * typical alignment matches.
1110 * A cacheline is typical/always less than a PAGE_SIZE so
1111 * the sections that has this restriction (or similar)
1112 * is located before the ones requiring PAGE_SIZE alignment.
1113 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
1114 * matches the requirement of PAGE_ALIGNED_DATA.
1115 *
1116 * use 0 as page_align if page_aligned data is not used */
1117#define RW_DATA(cacheline, pagealigned, inittask) \
1118 . = ALIGN(PAGE_SIZE); \
1119 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
1120 INIT_TASK_DATA(inittask) \
1121 NOSAVE_DATA \
1122 PAGE_ALIGNED_DATA(pagealigned) \
1123 CACHELINE_ALIGNED_DATA(cacheline) \
1124 READ_MOSTLY_DATA(cacheline) \
1125 DATA_DATA \
1126 CONSTRUCTORS \
1127 } \
1128 BUG_TABLE \
1129
1130#define INIT_TEXT_SECTION(inittext_align) \
1131 . = ALIGN(inittext_align); \
1132 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
1133 _sinittext = .; \
1134 INIT_TEXT \
1135 _einittext = .; \
1136 }
1137
1138#define INIT_DATA_SECTION(initsetup_align) \
1139 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
1140 INIT_DATA \
1141 INIT_SETUP(initsetup_align) \
1142 INIT_CALLS \
1143 CON_INITCALL \
1144 INIT_RAM_FS \
1145 }
1146
1147#define BSS_SECTION(sbss_align, bss_align, stop_align) \
1148 . = ALIGN(sbss_align); \
1149 __bss_start = .; \
1150 SBSS(sbss_align) \
1151 BSS(bss_align) \
1152 . = ALIGN(stop_align); \
1153 __bss_stop = .;